import { type TimerObservable } from '../types/index.mjs';
/**
 * Creates an observable that emits 0 after a specified delay and then completes.
 *
 * @param milliSeconds - The delay in milliseconds before emission
 * @param startManually - If true, waits for manual start (default: false)
 * @returns An observable that emits after delay
 *
 * @example
 * ```ts
 * //  Timeline:
 * //
 * //  Time(ms)  0     ...   1000
 * //  delayed$                X (emits and completes)
 * //
 * //  Explanation:
 * //  - timer emits once after the specified delay, then completes
 * //  - Useful for delayed actions or timeouts
 *
 * const delayed$ = timer(100);
 *
 * const valueHistory: number[] = [];
 *
 * await new Promise<void>((resolve) => {
 *   delayed$.subscribe(
 *     () => {
 *       valueHistory.push(1);
 *     },
 *     () => {
 *       resolve();
 *     },
 *   );
 * });
 *
 * assert.deepStrictEqual(valueHistory, [1]);
 * ```
 */
export declare const timer: (milliSeconds: number, options?: Readonly<{
    startManually?: boolean;
}>) => TimerObservable;
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